compile error with LiquidCrystal_I2C

Using Arduino Programming Questions
#1

I got one error with LiquidCrystal_I2C.h library:
lcd_I2C_example.cpp.o: In function __static_initialization_and_destruction_0': d:\Downloads\arduino-1.5.2-windows\arduino-1.5.2/lcd_I2C_example.ino:4: undefined reference to LiquidCrystal_I2C::LiquidCrystal_I2C(unsigned char, unsigned char, unsigned char)'
lcd_I2C_example.cpp.o: In function `setup':

I tried also another lib from https://bitbucket.org/fmalpartida/new-liquidcrystal/downloads - but still the same error occurs
( the LiquidCrystal_V1.2.1.zip)
I couldn't find another user report the same error here, strange. :relaxed:

thanks

Makis- Greece

#2

I’ll take a wild stab and say the error is in the setup() function, which is located in the source file lcd_I2C_example.cpp/.ino:

ERROR:
lcd_I2C_example.cpp.o: In function `setup’

.

When I find that file, I’ll possibly be able to give more help.

Also you may want to find a better location for your sketches:

d:\Downloads\arduino-1.5.2-windows\arduino-1.5.2/lcd_I2C_example.ino

#3

I can't change the "d:/downloads/..." to "my documents/Arduino" , I have change the preferences.txt, also I deleted the old directory , nothning!
How can I do this?

Makis

#4

alo!
Nobady uses this module?
any help?

#5

Could you provide a link to your exact Lcd?

#6
#7

Do you have that chip as well and have you tried the code on that page?
If you have tried that exact code, try to change 0x38 to 0x27 or 0x20 and see if that makes a difference.

#8

I get the same error. Did you find a solution?

#9